Janine's right, it's the eggs.
put a ton of conditioner on your hair, comb it through, get the beasties, then enlist the help of a friend to go through your hair really really thoroughly, and get every egg out.
i warn you potentially this could take hours, you need to be that thorough.
when youve done that, use another headlice lotion, ask your pharmacist what they'd recomend as they become resistant to some lotions so find out whats effective in your neighbourhood at the minute.
at the same time you do this you MUST wash all your tops, bedsheets, pillow cases, hats, cushion covers, any soft furnishing/ item of clothing that has been in contact with your head, and disinfect all your combs/hairbrushes.
Good luck!